System for modifying JCL statements to optimize data storage allocations

1. A system for modifying job control language (JCL) statements to optimize data storage allocations for datasets comprising: data collection means for collecting historical data concerning actual data storage space requirements of each dataset; parsing means for parsing JCL statements for references to datasets and requested data storage space allocations; and means for generating revised JCL statements containing revised requests for data storage space allocations for said datasets based on said historical data.

2. The system of claim 1 further comprising means for displaying revisions to said JCL statement and allowing a user to accept or reject said revisions.

3. The system of claim 1 wherein said means for generating revised JCL statements generates revised JCL statements requesting allocation of data storage space for each dataset in predetermined data storage areas grouped by predetermined ranges of size.

4. The system of claim 1 further comprising means for generating a report providing an audit trail documenting revisions to said JCL statements.

5. The system of claim 1 wherein said historical data includes data on the frequency of use for each dataset, and wherein said means for generating revised JCL statements also generates JCL parameters concerning dataset migration based on said historical data.

6. The system of claim 1 wherein said historical data for each dataset includes maximum size.

7. The system of claim 1 wherein said data collection means collects historical data for each dataset from system management facility (SMF) records maintained by the computer operating system.

8. A system for modifying job control language (JCL) statements to optimize data storage allocations for datasets comprising: data collection means for collecting historical data concerning actual data storage space requirements of each dataset; parsing means for parsing JCL statements for references to datasets and requested data storage space allocations; control tables containing a set of rules for substitution of parameters for data storage space allocation requests in JCL statements; and means for generating revised JCL statements containing revised data storage space allocation requests for said datasets based on said historical data and said rules in said control tables.

9. The system of claim 8 further comprising means for displaying revisions to said JCL statement and allowing a user to accept or reject said revisions.

10. The system of claim 8 further comprising means for generating a report providing an audit trail documenting revisions to said JCL statements.

11. The system of claim 8 wherein said historical data includes data on the frequency of use for each dataset, and wherein said means for generating revised JCL statements also generates JCL parameters concerning dataset migration based on said historical data.

12. The system of claim 8 wherein said historical data for each dataset includes maximum size.

13. The system of claim 8 wherein said control tables further comprises rules for conversion of said data storage space allocation request parameters into a predetermined DATA